StatNav: A Brief Explanation

Events:

We calculate points for all events in New Zealand at OY level and above. This includes the National Champs, Regional Champs, Long Weekend Multi-Day events and the OY series of Auckland, Hawkes Bay, Wellington, Nelson, PAPO and Dunedin. We may also include other events from time to time, particularly if they attract a number of orienteers from throughout the country. Our selection criteria does tend to under-represent the Central Districts and Southland areas; we'd love to be able to include more events from those clubs.

The rankings include Middle and Long Distance events and variations and, from July 2013, Sprint events. They exclude Relays, Night Events, Score Events and Rogaines.

You must complete five ranking events in a twelve month period to appear in the ranking lists.

Courses:

We track Red courses only, no ranking points are given for Orange, Yellow or White courses. We allocate points to all Red courses that have at least 10 orienteers who complete the course without mispunching. If a course fails to meet the 10 runner criteria it generally won't get ranking points allocated but occasionally we will make an exception. In recent years we have been making more and more exceptions as it appears six or seven ranked runners is sufficient to get a reasonable result.

Grades:

We calculate points at a Course level, not Grade level. This means that you will still gain ranking points even if you are running out of grade or running in a "Short" grade as long as you are running a Red course. The Grade Rankings on this website will show you in the grade that you qualify for on the basis of your year of birth regardless of what grade you normally run in. Information about your year of birth is difficult to source and so it is entirely possible that we've got yours wrong. If this is the case send us an email at admin@statnav.co.nz and let us know. Likewise, if you don't appear in the Grade Rankings at all, it is because we don't have any record of your year of birth. We'd love to hear from you if that's the case.

We only track grades M/W16 and above as M/W14 and below don't run Red courses. However, it is possible for a M/W14/12/10 to choose to run up and they would then be allocated ranking points. They will appear in M/W16 if they do.

Club:

To appear in the rankings list you must be associated with a New Zealand Orienteering Club. We'd love to insist that you are a financial member of that club but that information isn't easy to get so we go with the "association" test instead. Basically, if your club gives you OY points then we assume that they are happy to claim you. There is no requirement that you be a New Zealand resident or citizen, a number of short term overseas visitors appear in the ranking list due to the "association" test. As with grades, it is possible that we've got your club association wrong, particularly if you have changed clubs since we started tracking results at the beginning of 2011. Chide us gently at admin@statnav.co.nz and we'll make sure it is correct next month.

Points:

We calculate points using a variation of the algorithm that the British Orienteering Federation designed for their ranking system and that has since been adopted for World Ranking points. You can get a full explanation of how it works at the BOF website; our points system differs in that we count the best five events over a twelve month period rather than the six that the British use, and we only update once a month rather than their weekly system.

Every orienteer that we track has a "Current Score" which is the average (mean) of the points per event they have scored in the past twelve months. We adjust these scores every month so that nationwide the average Current Score is 1000 with a standard deviation of 200. In practice, this is quite a small adjustment with most months scores being adjusted by less than 10 points.

For each course at each event we calculate the average and standard deviation of the Current Scores of all the orienteers who complete the course and then compare that to the average and standard deviation of the times taken by those orienteers. We exclude the bottom 10% (rounded up) from that calculation. Non-ranked orienteers (those without a current score or those not associated with a New Zealand orienteering club) are excluded from the calculation but do get allocated points.

Your ranking score is then the sum of your best five results from the last twelve months. This is updated monthly with a months results rolling off as each new month is added. Hence your ranking score may change even if you don't compete in any events in a given month.

Remember that only orienteers who have scored points in five or more events in the last twelve months will appear in the ranking lists.

Abbreviations used on this site

Rank - Your ranking in this grade, club or overall list.Change - Your change in ranking since last month.Club - The New Zealand orienteering club you are associated with.SS - The SuperSeries region you should be cheering for.Sex - You should be able to work this one out.YoB - Year of Birth.OIK - Orienteer Identification Key. The unique number by which you are identified in StatNav's database.Grade - The Grade into which you have been allocated according to your sex and year of birth.Count - The number of ranking events you completed in the last year.Score - Your Ranking Score, the sum of your best five results in the last year.Diff - The change in your Ranking Score since last month.ORank - Your ranking in the overall list.

Official Rankings

You'll notice that we advertise ourselves as New Zealand's UNOFFICIAL Orienteering Rankings. That's because there is an official ranking list that uses a different ranking formula and focuses only on major events, omitting OY results. You can find New Zealand's Official Orienteering Rankings at www.orienteeringresults.com.

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